# US 10,871,127 B2 · Extended expander cycle system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,871,127 B2 - Document ID: US10871127B2 - Status: Granted - Kind: B2 - Application number: 16/040,377 - Filed: 2018-07-19 - Published: 2019-03-07 - Granted: 2020-12-22 - Earliest claimed: 2017-09-01 - Applicants: Nadir T Bagaveyev - Inventors: Nadir T Bagaveyev - Web page: https://patentgrep.com/patent/US10871127B2 ## CPC - F02K 9/48: driven by a gas turbine fed by propellant combustion gases {or fed by vaporized propellants or other gases} - F02C 7/22: Fuel supply systems - F02C 7/222: {Fuel flow conduits, e.g. manifolds} - F02C 7/224: Heating fuel before feeding to the burner - F02K 9/46: using pumps - F02K 9/64: having cooling arrangements - F02K: JET-PROPULSION PLANTS (features of jet-propulsion plants common to gas-turbine plants, air intakes or fuel supply control of air-breathing jet-propulsion plants F02C7/00, F02C9/00) - F02C: GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS (construction of turbines F01D; jet-propulsion plants F02K; construction of compressors or fans F04; generating combustion products of high pressure or high velocity F23R; using gas turbines in compression refrigeration plants F25B11/00) ## Abstract An extended expander cycle system comprising a rocket engine having a plurality of channels; a plurality of fuel supplied one-wheel-turbopumps; a plurality of oxidizer supplied one-wheel-turbopumps; wherein utilization of the plurality of channels for both fuel and oxidizer and utilization of plurality of fuel and oxidizer supplied one-wheel-turbopumps provides adequate energy for fuel and oxidizer pressurization. ## Claims ### Claim 1 An extended expander cycle system, comprising: a rocket engine having a plurality of channels; a plurality of fuel supplied one-wheel-turbopumps, each of said plurality of fuel supplied one-wheel-turbopumps comprising a fuel pump, a fuel turbine, a first fuel conduit, and a second fuel conduit, wherein a fuel is received by said fuel pumps via said first fuel conduit, pressurized through said fuel pumps of the fuel supplied one-wheel-turbopumps, transferred to said plurality of channels for heating via said second fuel conduit, transferred from said plurality of channels to said fuel turbines via said second fuel conduit, processed by said fuel turbines and transferred to said rocket engine via said first fuel conduit of said plurality of fuel supplied one-wheel-turbopumps; and a plurality of oxidizer supplied one-wheel-turbopumps each of said plurality of oxidizer supplied one-wheel-turbopumps comprising an oxidizer pump, an oxidizer turbine, a first oxidizer conduit, and a second oxidizer conduit, wherein an oxidizer is received by said oxidizer pumps via said first oxidizer conduit, processed through said oxidizer pumps of the oxidizer supplied one-wheel-turbopumps, transferred to said plurality of channels for heating via said second oxidizer conduit, transferred from said plurality of channels to said oxidizer turbines via said second oxidizer conduit, processed by said oxidizer turbines and transferred to said rocket engine via said first oxidizer conduit of said plurality of oxidizer supplied one-wheel-turbopumps; wherein utilization of said plurality of channels for both said fuel and said oxidizer provides adequate energy for fuel and oxidizer pressurization. ### Claim 2 (depends on 1) The extended expander cycle system of claim 1, wherein said plurality of channels are coiled channels disposed on an outer surface of said rocket engine. ### Claim 3 (depends on 1) The extended expander cycle system of claim 1, wherein said plurality of channels are in wall channels within a housing of said rocket engine. ### Claim 4 (depends on 1) The extended expander cycle system of claim 1, wherein said plurality of channels are radially extending projections from a housing of said rocket engine. ### Claim 5 (depends on 1) The extended expander cycle system of claim 1, wherein said plurality of channels are coiled channels disposed on an outer surface of said rocket engine, in wall channels within a housing of said rocket engine and radially extending projections from said housing of said rocket engine, and wherein a utilization of said plurality of channels provides heated surfaces within said rocket engine. ### Claim 6 (depends on 1) The extended expander cycle system of claim 1 wherein both said fuel and said oxidizer are heated in same said rocket engine. ### Claim 7 (depends on 1) The extended expander cycle system of claim 1, wherein each fuel supplied one-wheel-turbopump of said plurality of fuel supplied one-wheel-turbopumps, comprises: a housing; a wheel rotatably mounted within said housing; said fuel pump structurally coupled to said wheel; said fuel turbine structurally coupled to said wheel; a seal separating said fuel turbine from said fuel pump; said first fuel conduit coupled to said housing serving as a fuel pump inlet and a fuel turbine outlet; said second fuel conduit coupled to said housing serving as a fuel pump outlet and a fuel turbine inlet; securing means coupled to said housing adapted to secure said plurality of fuel supplied one-wheel-turbopumps together. ### Claim 8 (depends on 1) The extended expander cycle system of claim 1, wherein each oxidizer supplied one-wheel-turbopump of said plurality of oxidizer supplied one-wheel-turbopumps comprises: a housing; a wheel rotatably mounted within said housing; said oxidizer pump structurally coupled to said wheel; said oxidizer turbine structurally coupled to said wheel; a seal separating said oxidizer turbine from said oxidizer pump; said first oxidizer conduit coupled to said housing serving as an oxidizer pump inlet and an oxidizer turbine outlet; said second oxidizer conduit coupled to said housing serving as an oxidizer pump outlet and an oxidizer turbine inlet; securing means coupled to said housing to secure said plurality of oxidizer supplied one-wheel-turbopumps together. ### Claim 9 A method of operating an extended expander cycle system, comprising: processing a fuel through a pump side of a one-wheel-turbopump, heating said fuel through a plurality of channels coupled to a rocket engine, processing said fuel through a turbine side of said one-wheel-turbopump, and delivering a processed fuel to said rocket engine for combustion, processing an oxidizer through said pump side of said one-wheel-turbopump, heating said oxidizer through the plurality of channels coupled to the rocket engine, processing the oxidizer through said turbine side of said one-wheel-turbopump, and delivering a processed oxidizer to said rocket engine for combustion, wherein both fuel and oxidizer are heated in same said rocket engine. ### Claim 10 (depends on 9) The method of operating an extended expander cycle rocket engine of claim 9, wherein said fuel and said oxidizer are processed multiple times through said pump side, said plurality of channels, and said turbine side, prior to being received by said rocket engine for combustion. ### Claim 11 (depends on 9) The method of operating an extended expander cycle rocket engine of claim 9, wherein said fuel and said oxidizer are processed through a plurality of one-wheel-turbopumps prior to being received by said rocket engine for combustion.